JPH0622525Y2 - Mold coating agent coating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a coating agent application device for applying a coating agent to a mold.

[Conventional technology]

Generally, in a shell mold used for casting, a portion of the mold that comes into contact with the high temperature molten metal immediately after pouring during casting or a pool of molten metal is likely to reach a high temperature is a caking resin layer on the surface of the mold. It is necessary to apply a liquid type coating agent in order to prevent the destruction of. Conventionally, the mold-coating agent was manually applied to the shell mold by using a spray, but recently, for example, the actual mold-coating method is used.
A coating agent is applied by a coating agent application device as described in Japanese Patent Laid-Open No. 65174 to improve the efficiency of the coating operation.

[Problems to be solved by the device]

The coating agent applying apparatus described in the above publication is a method of applying a relatively wide application portion of the shell mold to a uniform height level by immersing the coating solution in a coating solution containing a coating solution. For,
Among the shell molds that are located above the surface of the coating liquid during immersion, the part that is kept at a high temperature by forming a pool during pouring is positioned higher than the liquid surface of the coating liquid tray. In some cases, there is a problem that the coating agent cannot be applied there.

Further, there is a problem that the working efficiency is lowered because the coating liquid must be manually applied to the portion where the coating liquid cannot be applied by dipping.

SUMMARY OF THE INVENTION An object of the present invention is to provide a casting mold coating agent coating device capable of automatically coating the coating liquid even on a portion of the mold located above the liquid surface of the coating liquid tray, which is required for coating. .

[Means for Solving the Problems]

A casting mold coating agent coating device according to the present invention comprises a coating liquid tank containing a coating liquid, a mold placing member provided at a predetermined position above the liquid surface of the coating liquid tank, and a coating liquid. The coating liquid tray is provided so as to be capable of moving up and down at a lowered position where the coating liquid tray is sunk below the liquid surface, and a raised position where the liquid is raised a predetermined stroke above the liquid surface, and an elevating drive means for vertically moving the coating liquid tray. , With the mold placed on the mold mounting member, the coating liquid is raised from the lowered position to the raised position, and a predetermined portion of the mold is immersed in the coating liquid of the coating liquid plate to form the coating liquid on the mold. In the mold coating agent coating device for applying a mold, the coating liquid plate is provided with a coating liquid cup having an upper end opened and a nozzle connected to the coating liquid cup in communication with the coating liquid cup. The cap member is provided at a position corresponding to the ascending position and is connectable in a state of closing the opening of the coating liquid cup. The liquid cup is provided with a pressurized air supply means for supplying pressurized air.

[Action]

In the mold coating agent coating device according to the present invention, when the mold coating liquid is applied to the mold, the portion of the mold that is to be coated by dipping in the mold coating liquid faces downward and is mounted on the mold mounting member. After placing, the coating liquid tray is raised from the lowered position to the raised position by the lifting drive means. At this time, the coating liquid is stored in the coating liquid tray up to the upper edge thereof and is filled with the coating liquid from the vicinity of the opening of the coating liquid cup to the nozzle.

When the coating liquid tray is in the raised position, the lower end of the mold is immersed in the coating liquid tray, and the opening of the coating liquid cup is closed by connecting to the cap member of the pressurized air supply means. Get off.

After that, when pressurized air is supplied to the coating liquid cup by the pressurized air supply means, the coating liquid filled in the nozzle from the coating liquid cup is ejected from the nozzle by the air pressure, and the liquid in the coating liquid tray is discharged. The coating liquid is applied to the required portion of the mold located above the surface.

When the application of the coating liquid to the mold is completed, it is moved from the mold mounting member to dry the mold, and it is lowered by the elevating drive means to replenish the coating liquid to the coating liquid tray and the coating liquid cup. Lower to position.

In this way, in parallel with the coating of the coating liquid by dipping in the coating liquid dish, the coating liquid is automatically applied to the portion of the mold above the liquid surface of the coating liquid plate that needs to be coated. The coating work is completely automated and the work efficiency can be improved.

[Effect of device]

According to the mold coating agent coating device of the present invention, as described in the above section [Operation], the coating liquid coating device, the nozzle, and the pressurized air supply means including the cap member are provided to coat the mold. The coating liquid can be automatically applied through the nozzle to the portion of the mold located above the liquid surface of the mold that needs to be coated, so that the coating work can be fully automated and work efficiency can be improved. Therefore, it is possible to obtain an effect that the manual application work can be omitted and the work cost can be reduced.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

The present embodiment is a core W for a water jacket, which is a shell mold of a cylinder block of a four-cylinder engine for automobiles.
This is an example in which the present invention is applied to a coating agent coating device T for coating a coating agent (hereinafter referred to as a core).

As shown in FIGS. 1 and 2, the coating agent coating device T includes a coating liquid tank 10 containing a coating liquid L, and a liquid level of the coating liquid L in the coating liquid tank 10 above the liquid surface. A mold placement member 20 for mounting the core W, a mold coating liquid tray 30 for immersing the core W in the coating liquid L, and a lifting drive for the coating liquid tray 30. The elevation drive device 40 and the coating liquid ejecting device 50 for applying the coating liquid L to a required portion of the core W above the portion to be immersed in the coating liquid L are included.

The coating liquid tank 10 is formed in a box-shaped body having an open upper surface, and the coating liquid L in which fine clay particles, carbon particles, silicon-based resin powder, and the like are dissolved in water is stored therein.

A supporting wheel 12 is provided at a lower end of a base frame 11 which is a lower part of the coating liquid tank 10, and the coating liquid tank 10 includes the supporting wheel 1.
It is possible to move on the floor via 2.

As shown in FIG. 2, a duct 13 is provided downward on the front wall portion 10a of the coating liquid tank 10, and a plate member 14 having a large number of holes 14a is provided at an upper end portion of the duct 13. The lower end of the duct 13 projects into the base frame 11 and the waste liquid tank 15 provided in the base frame 11
Facing. In addition, an operation box 17 having an ON operation button 16a and an OFF operation button 16b is provided on the left wall portion 10d of the coating liquid tank 10, and the operation box 17 has a timer built therein.

A sand removing valve 18 is provided below the right wall portion 10b of the coating liquid tank 10 to remove the shell sand mixed in the coating liquid L and settling.

As shown in FIG. 2, the template mounting member 20 is an L-shaped member in a side view, and is fixed to the center of the upper end of the rear wall portion 10c of the coating liquid tank 10 via a fixing member 19. It is provided at a predetermined position above the liquid surface of the coating liquid L of No. 10.

Four through holes 20c are formed in the lower wall portion 20b of the template mounting member 20 at predetermined intervals, and when the core W is disposed on the template mounting member 20, as shown in FIG. To W
The four cylindrical portions Wa correspond to the through holes 20c, and the left and right side wall portions Wb of the core W are placed and placed on the left and right side wall portions 20d of the mold placing member 20, respectively. .

Further, of the core W, the left and right side wall portions Wb and the respective cylindrical portions Wa
The lower end of the partition wall portion Wc between is a portion through which the high-temperature molten metal immediately after pouring during casting passes and comes into contact with this molten metal. In addition, among the four cylindrical portions Wa, the hole Wd in the middle step of the inner wall of the cylindrical portion Wa at the right end.
Is a branch point where the molten metal diverts and forms a pool of molten metal. These portions are the coating-required portions that require the application of the coating liquid because the resin layer of the shell mold is easily destroyed by the molten metal.

The above-mentioned coating liquid tray 30 is a frame member 3 in which the coating liquid tray main body 31 and the coating liquid tray main body 31 are detachably arranged and whose upper and lower ends are open.
2, the mounting members 33 are provided in the front-rear direction on the left and right sides of the lower end of the main body 31 of the coating liquid tray, and the left and right mounting members 33 are provided with a steel mesh-like stirring member 34. ing.

Further, a support member 36 extending upward via a connecting member 35 is provided at each of a left end portion and a right end portion of the rear wall portion 31a of the moldable liquid dish main body 31, and upper end portions of the left and right support members 36 are provided. A connecting plate member 37 is provided.

The lift drive device 40 will be described. The coating liquid tank 1
An elevating cylinder 41, which is an air cylinder, is provided upright at the center of the rear end surface of the rear wall part 0c of the rear end portion 0 in the left-right direction, and guide rods 42 are provided on the left and right sides of the elevating cylinder 41, respectively. The guide rods 42 are provided outside in the vertical direction on the outside of 10c, and are slidably inserted into a guide tool (not shown) fixed to the rear wall portion 10c, and the rod 41a of the lifting cylinder 41 and the left and right guide rods 42 are provided. Is fixed to the connecting plate member 37.

The lifting cylinder 41 is connected to the pressurized air supply source S by an air hose 44 via an electromagnetic three-way switching valve 43, and the electromagnetic switching valve 43 is connected to the operation box 17.

When the ON operation button 16a of the operation box 17 is pushed, the electromagnetic switching valve 43 is switched to the supply position and pressurized air is supplied to the lifting cylinder 41, as shown in FIG. 1 and FIG.
As indicated by the chain double-dashed line, the rod 41a is driven to move upward by a predetermined stroke as shown by the dashed-dotted line, and the coating liquid tray 30 descends from the lowered position below the liquid surface of the coating liquid tank 10 shown by the solid line. The mold placing member 20 and the lower end of the core W are moved up to a rising position where they are immersed in the coating agent in the coating liquid tray 30.

On the other hand, when the OFF operation button 16b of the operation box 17 is pressed, the electromagnetic switching valve 43 is switched to the supply stop / discharge position and the pressurized air in the lifting cylinder 41 is discharged to the atmosphere, and conversely to the above, the rod 41a. Is lowered and the coating liquid tray 30 is switched from the raised position to the lowered position.

The coating liquid ejecting apparatus 50 includes a coating liquid supply unit provided in the coating liquid tray 30 and a pressurized air supply unit provided in the coating liquid tank 10.

Explaining the coating liquid supply section, the mold mounting member 2
In the portion of the coating liquid dish main body 31 facing the through hole 20c on the right end side of 0, the nozzle 52 is erected so that the nozzle opening 52a projects above the frame member 32. A mold coating liquid cup 53 having an opening 53a on the upper right side
The nozzle 52 and the coating liquid cup 53 are connected and connected by a pipe member 54, and the pipe member 54 is fixed to the mounting member 33 by inserting the mounting member 33 on the right side.

When the coating liquid tray 30 is switched to the raised position, the coating liquid supply section is switched to the raised position indicated by the chain double-dashed line in FIGS. 1 and 2.

The above-mentioned pressurized air supply unit will be explained.
The right wall portion 10b of the bracket member 55 having an L-shape when viewed from the front.
Is provided and four shaft members 56 are vertically movably mounted on the upper wall portion of the bracket member 55 extending above the rising position of the coating liquid supply unit. Is provided with a cap member 57 for closing the opening 53a of the coating liquid cup 53 and fixed to the lower end of the shaft member 56 with the opening facing downward.
6 is urged downward by a spring member 58 formed of a compression coil spring.

A rubber seal member 59 having an opening 59a is fixed to the lower end of the cap member 57, and a cylindrical connecting portion 57a is formed at the upper end of the cap member 57 so as to pass through the hole 55a of the bracket 55. 57a is an air hose 62 having a pressure reducing valve 60 and an electromagnetic switching valve 61, and a pressurized air supply source S
The electromagnetic switching valve 61 is connected to the operation box 17.

A limit switch 63 is fixed to the upper wall portion of the bracket member 55, the output wire of the limit switch 63 is connected to a timer built in the operation box 17, and after the limit switch 63 is turned on by the cap member 57, the timer is started. The electromagnetic switching valve 61 is switched to the open position and the limit switch 63 is turned off after a predetermined time has elapsed.
Then, the electromagnetic switching valve 61 can be closed.

The operation of the coating agent applying apparatus T configured as described above will be described.

When applying the coating liquid L to the core W, the core W is arranged at a predetermined position of the mold mounting member 20 as described above.

Next, the ON operation button 16a of the operation box 17 is pressed to drive the lifting cylinder 41 to move upward, and the coating liquid tray 30
To the raised position. At this time, the coating liquid L is accommodated in the coating liquid tray 30 up to the upper edge of the frame member 32, and the coating liquid supply unit is provided with the pipe member 54 through the opening 53 of the coating liquid cup 53.
When the coating liquid L is filled up to a, it rises from the liquid surface. The nozzle 52 is inserted through the through hole 20c at the right end of the mold mounting member 20 and ascends, and while the coating liquid cup 53 is in contact with the seal member 59, the coating liquid 53 is raised against the spring force of the spring member 58 to supply the coating liquid. When the portion is in the raised position as shown in FIG. 3, the upper end of the cap member 57 contacts the limit switch 63, and the limit switch 63 is turned on.

When the coating liquid supply section is in the raised position, as shown in FIG. 3, the coating liquid cup 53 has a seal member 59 which is urged downward by a spring member 58 at the peripheral edge of the opening 53a. Is airtightly closed and connected to the cap member 57, the nozzle opening 52a of the nozzle 52 is in a state of facing the inner wall portion hole Wd of the inner wall portion of the core W, and the left and right side wall portions Wb and the lower ends of the partition walls Wc. Is immersed in the coating liquid L.

When the ON signal from the limit switch 63 is input to the timer in the operation box 17, the timer is started and after a predetermined time has elapsed, the electromagnetic switching valve 61 is switched to the open position, and the predetermined air pressure is supplied via the pressure reducing valve 60. Pressurized air is the coating liquid cup 5
3 is supplied. The pressurizing air jets the coating liquid L from the nozzle port 52a, and the coating liquid is applied to the hole Wd in the middle part of the inner wall located above the liquid surface of the coating liquid L in the coating liquid tray 30. The timer time is set to about 3 to 5 seconds.

Next, the OFF operation button 16b of the operation box 17 is pressed after a predetermined immersion time of the core W in the mold coating liquid dish 30,
The electromagnetic switching valve 43 is switched to the supply stop / discharge position and the lifting cylinder 41 is driven downward to lower the coating liquid tray 30 to the lowered position. When the limit switch 63 is turned off by starting the descent of the cap member 57, the electromagnetic switching valve 61
Is switched to the closed position, supply of pressurized air to the coating liquid cup 53 is stopped, and coating by the coating liquid ejecting apparatus 50 is completed.

Next, the core W is transferred from the mold mounting member 20 onto the plate member 14, and the coating film of the core W is dried for a predetermined time, thereby completing the coating process.

As described above, according to the coating agent coating device T, the coating liquid ejecting device 50 can automatically apply the coating liquid L to the coating-required portion above the liquid surface of the coating liquid tray 30. Therefore, the coating work can be completely automated, the efficiency of the coating work can be improved, the manual coating work can be omitted, and the work cost can be reduced.

In addition, the number of nozzles 52 is required to be applied, or the number of cores W
A plurality of types may be provided according to the type of the above, and the type coating liquid cup 53 may be enlarged or a plurality of types may be provided according to the number of nozzles 52.

Further, the operation buttons 16a and 16b are omitted, and a detection switch for detecting the disposition of the core W is provided on the mold mounting member 20, and the electromagnetic switching valve 43 is automatically switched by a detection signal from the detection switch. The lifting cylinder 41 may be driven up and down.

[Brief description of drawings]

FIGS. 1 to 3 show an embodiment of the present invention. FIG. 1 is a vertical sectional front view of a main part of a coating agent applying apparatus, and FIG. 2 is FIG.
-II line sectional drawing, FIG. 3 is a principal part longitudinal sectional view which shows the coating liquid application state. 10 ... Coating liquid tank, 20 ... Mold mounting member, 30 ... Coating liquid tray, 40 ... Elevating drive device, 50 ... Coating liquid spraying device, 52 ... Nozzle, 53 ... Coating mold Liquid cup, 53a ... Opening part, 57 ... Cap member, L ... Coating liquid, S ... Pressurized air supply source, T ... Coating agent application device.

Claims (1)

[Scope of utility model registration request] 1. A coating liquid tank containing a coating liquid, a mold mounting member provided at a predetermined position above the liquid surface of the coating liquid tank, and a submerged liquid below the liquid surface of the coating liquid tank. The coating liquid tray is provided so as to be able to move up and down in a lowered position and a raised position where it is raised by a predetermined stroke above the liquid surface, and an elevating drive means for raising and lowering the coating liquid tray is provided. The coating liquid is applied to the mold by raising the coating liquid tray from the lowered position to the raised position and immersing a predetermined part of the mold in the coating liquid of the coating liquid tray in the installed state. In the apparatus, the coating liquid tray is provided with a coating liquid cup having an open upper end and a nozzle connected in communication with the coating liquid cup, and is arranged at a position corresponding to a rising position of the coating liquid cup. Equipped with a cap member that can be connected to close the opening of the coating liquid cup and supply pressurized air to the coating liquid cup Coating agent applying device of the mold, characterized in that a pressurized air supply means that.